It might come sooner than you think. Maybe not for next gen consoles, but certainly the next after the next. Maybe around 10 years from now or something (Just my guess)

Pandaren Warrior - Lv 95, full T17

Originally Posted by Cyclonus

Since this was early in the patch, we decided to go with the 4 tank strat. We ask him to go tank Lord Mograine. He then instantly tells us that "he cannot tank the godfather of DK's, it wouldnt be right to raise my axe against him". He instantly gquits and hearths out.

I would say when the average home computer or console can handle them, and run smoothly. The thing keeping back developers isn't the inability to create the graphics you are describing for gameplay, it is that the massive system requirements that it would take to handle the games won't be available (financially) to the general public for years.